Paper · 1970 · Journal of the American Society for Horticultural Science

Nitrogen Rate Effects on Lemon Production, Quality and Leaf Nitrogen1

W. W. Jones; T. W. Embleton; S. B. Boswell; et al.

8
claims
16
verbatim quotes
20
citations
3
research areas
✓
Open access · cc-by-nc-nd

Abstract

Abstract ‘Prior Lisbon’ lemon trees were treated with increasing rates of N fertilizer up to 6 lb. N per tree per year. Likewise, ‘Monroe Lisbon’ lemon trees were treated with up to 4 lb. N per tree per year. Also, for the Trior Lisbon/one treatment was 6 urea foliage sprays per year which supplied about 2 lb. N per tree per year. For the Trior Lisbon’ there was a tendency for yields to increase with increasing N rates with the high rate yielding significantly more than the low rate. Yield was highly correlated with leaf N with maximum yield occurring at about 2.2% leaf N. Urea foliage sprays maintained leaf N and maximum yield. Fruit quality was not adversely affected by increasing N. As with Prior ‘Lisbon’, ‘Monroe Lisbon’ yields increased with increasing N but the maximum yield occurred at about 2.5% leaf N. Yields from single N applications were not different from split N applications.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 8

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Prior Lisbon yield tended to increase with increasing nitrogen rates; the high rate significantly exceeded the low rate.

Material
Trior Lisbon’e0
Treatment
increasing N ratese0
Outcome
yieldse0
Direction
increasee0
Comparator
low ratee0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Citrus x limon
Citrus ×limon · TaxonElena Chochkova · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“For the Trior Lisbon’ there was a tendency for yields to increase with increasing N rates with the high rate yielding significantly more than the low rate”

✓ located verbatim in the source · abstract, characters 333–487 · show in text ↑
t0

“Lemon”

✓ located verbatim in the source · title, characters 25–30 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Yield was highly correlated with leaf nitrogen.

Compound
leaf Ne0
Outcome
Yielde0
Value
2.2% leaf Ne0

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Citrus x limon
Citrus ×limon · TaxonElena Chochkova · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Yield was highly correlated with leaf N with maximum yield occurring at about 2.2% leaf N”

✓ located verbatim in the source · abstract, characters 489–578 · show in text ↑
t0

“Lemon”

✓ located verbatim in the source · title, characters 25–30 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Maximum yield occurred at about 2.2% leaf nitrogen in Prior Lisbon.

Outcome
maximum yielde0
Value
2.2% leaf Ne0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Citrus x limon
Citrus ×limon · TaxonElena Chochkova · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“maximum yield occurring at about 2.2% leaf N”

✓ located verbatim in the source · abstract, characters 534–578 · show in text ↑
t0

“Lemon”

✓ located verbatim in the source · title, characters 25–30 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Urea foliage sprays maintained leaf nitrogen and maximum yield.

Treatment
Urea foliage sprayse0
Outcome
leaf N and maximum yielde0
Direction
maintainede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Citrus x limon
Citrus ×limon · TaxonElena Chochkova · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Urea foliage sprays maintained leaf N and maximum yield”

✓ located verbatim in the source · abstract, characters 580–635 · show in text ↑
t0

“Lemon”

✓ located verbatim in the source · title, characters 25–30 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Increasing nitrogen did not adversely affect fruit quality.

Treatment
increasing Ne0
Outcome
Fruit qualitye0
Direction
not adversely affectede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Citrus x limon
Citrus ×limon · TaxonElena Chochkova · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Fruit quality was not adversely affected by increasing N”

✓ located verbatim in the source · abstract, characters 637–693 · show in text ↑
t0

“Lemon”

✓ located verbatim in the source · title, characters 25–30 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Monroe Lisbon yields increased with increasing nitrogen.

Material
Monroe Lisbone0
Treatment
increasing Ne0
Outcome
yieldse0
Direction
increasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Citrus x limon
Citrus ×limon · TaxonElena Chochkova · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“‘Monroe Lisbon’ yields increased with increasing N but the maximum yield occurred at about 2.5% leaf N”

✓ located verbatim in the source · abstract, characters 719–821 · show in text ↑
t0

“Lemon”

✓ located verbatim in the source · title, characters 25–30 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Monroe Lisbon maximum yield occurred at about 2.5% leaf nitrogen.

Outcome
maximum yielde0
Value
2.5% leaf Ne0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Citrus x limon
Citrus ×limon · TaxonElena Chochkova · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“the maximum yield occurred at about 2.5% leaf N”

✓ located verbatim in the source · abstract, characters 774–821 · show in text ↑
t0

“Lemon”

✓ located verbatim in the source · title, characters 25–30 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Single and split nitrogen applications produced yields that were not different.

Treatment
single N applicationse0
Outcome
Yieldse0
Direction
not differente0
Comparator
split N applicationse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Citrus x limon
Citrus ×limon · TaxonElena Chochkova · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Yields from single N applications were not different from split N applications”

✓ located verbatim in the source · abstract, characters 823–901 · show in text ↑
t0

“Lemon”

✓ located verbatim in the source · title, characters 25–30 · show in text ↑

application · yield · Citrus x limon (lemon)Positive and negative results

10 papers: 9 positive, 1 negative or no effect

8 papers in the same direction as this paper · 1 in the opposite direction

  1. positive
  2. no effect
  3. positive

6 papers more in this group

See all 10 papers →

nitrogen · yield · Citrus x limon (lemon)Results agree

5 papers: 5 positive, 0 negative or no effect

4 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

1 paper more in this group

See all 5 papers →

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.